Improvement in mash-tubs



G.YOUNG'Q Mash-Tub.

No. 216,011. Patented May 27,1879.

II D

HHI l I INVENTOR:

WITNESSES ATTORNEYS.

N. PETERS, PHOTO-LITRQGRAPHER, wASHmGToN, D of UNITED STATES 'PATENTQFFICE.

GOTTLEIB YOUNG, OF COLUMBIA, PENNSYLVANIA.

IMPROVEMENT IN MASH-TUBS.

Specification forming part of Letters Patent No. 216,011, dated May 27,1879; application filed March 8, 1879.

To all whom it may concern:

Be it known that I, GOTTLEIB YOUNG, of Columbia, in the county ofLancaster and State of Pennsylvania, have invented a new and ImprovedMash -Tub; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to theaccompanying drawings, forming part of this specification, in whichFigure 1 is a vertical section; Fig. 2, a horizontal section Fig.3, asectional detail of the bottom of the tub. I

My invention is an improvement in mashtubs for holding and mixing themash or mixture of malt and warm water used in making malt liquors. Insuch tubs a vertical shaft is provided with stirrers, which, upon therevolution of said shaft, stir the mash and permit the liquor to run outtherefrom, while a false bottom separates the mash from the liquor andallows the latter to be drawn off.

My invention consists in the peculiar construction and arrangement ofthe stirring devices, and in the construction of the false bottom, ashereinafter more fully described.

In the drawings, A represents the tub, which may be of any desired size.B is a yokeshaped frame, resting upon the upper edges of the tub, andbolted thereto and spanning the center of the tub. O is a central shaft,arranged in bearings in the yoke shaped frame atthe top, and resting atits lower end upon a step, a, in the bottom of the tub. On the top ofthis shaft is fixed a crown-wheel, I), with which engages at rightangles a pinion, 0, arranged in a suitable frame, and rotated by acrank-handle, d, which devices furnish means for rotating the centralshaft. Upon the lower portion of this central shaft is fixed a series ofhorizontal blades, D, formed of flat bars of metal slightly twisted, sothat the upper edges incline forwardly. These blades arefasteneddirectly to one side of the square shaft 0 by a single screw, 0.

E E are a series of horizontal bars fixed to a vertical bar, F, screwedto one side of the tub, while bars E extend to the center of the tub,and are provided with bearings that encompass the central shaft betweenthe blades. The merit of this arrangement of the bars E is as follows:The said bars E, it will be seen, co-operate with arms D to mash andsqueeze the material and promote the elimination of the liquor. In orderto do this they must approach the arms D more or less closely, and thiscauses, by reason of the stiff character of the semi-fluid mass, a greatstrain on the necessarily long arms E. By causing the ends of such armsto encircle the main shaft, said arms are thoroughly braced and heldfirmly at both ends, and a much more efficient and substantialconstruction of mash-tub is obtained. The false bottom is formed bycutting out the upper portion of the bottom of the tub on each side ofthe bars E in the shape of halfcircles, and then covering over theserecesses by corresponding semicircular plates G, which are perforatedwith numerous holes, and are secured by straps f f. These perforatedhottom-plates form, with the recessed bottom, a shallow chamber, intowhich the liquor runs, and from which said liquor is drawn off by asuitable pipe, g.

In defining my invention more clearly, I would state that I am awarethat in rotary churns agitator-blades corresponding to my blades D havebeen used in connection with resisting-blades corresponding to the barsE of my invention. In such case, however, the

said bars (corresponding to E) had free ends,

and were disconnected from the shaft, since the small diameter of thechurn permitted said arms to be made sufficiently short and rigid. In avessel of the diameter of a mash-tub these bars have not been employed,for the reason that their length permitted too much flexibility. Byattaching them to and causing them to encircle the shaft in the center Iobviate this difficulty,,and am enabled to employ this desirable form ofstirring apparatus.

With respect to the false bottom, also, I am aw are that a circularperforated pipe has been embedded in the bottom of a mash-tub. This,however, affords insufficient means for drawing off the liquor, and willsoon become filled with solid particles that cannot be easily re- Ymoved. My construction of recessed bottom and perforated plates givesfree vent to the liquor. The plates may be removed to clean the recess,and their shape permits such removal or dug out to form semicircularrecesses, in

combination with correspondingly-shaped perh forated plates G, as shownand described.

The above specification of my invention signed by me this 20th day ofFebruary, A. D. 1879.

GOTTLEIB YOUNG.

Witnesses:

SoLoN (J. KEMoN, CHAS. A. PETTIT.

